package cn.com.dhc.danlu.widget;

import android.content.Context;
import android.graphics.drawable.Drawable;
import android.support.v7.widget.AppCompatEditText;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnFocusChangeListener;
import android.view.animation.Animation;
import android.view.animation.CycleInterpolator;
import android.view.animation.TranslateAnimation;
import android.widget.LinearLayout;

import cn.com.dhc.danlu.R;

public class ClearEditText extends AppCompatEditText implements OnFocusChangeListener, TextWatcher {
    /**
     * 删除按钮的引用
     */
    private Drawable mClearDrawable;
    /**
     * 控件是否有焦点
     */
    private boolean hasFoucs;
    private LinearLayout llytSearch;

    public ClearEditText (Context context) {
        this (context, null);
    }

    public ClearEditText (Context context, AttributeSet attrs) {
        // 这里构造方法也很重要，不加这个很多属性不能再XML里面定义
        this (context, attrs, android.R.attr.editTextStyle);
    }

    public ClearEditText (Context context, AttributeSet attrs, int defStyle) {
        super (context, attrs, defStyle);
        init ();
    }

    /**
     * 晃动动画
     *
     * @param counts
     *         1秒钟晃动多少下
     */
    public static Animation shakeAnimation (int counts) {
        Animation translateAnimation = new TranslateAnimation (0, 10, 0, 0);
        translateAnimation.setInterpolator (new CycleInterpolator (counts));
        translateAnimation.setDuration (1000);
        return translateAnimation;
    }

    private void init () {
        // 获取EditText的DrawableRight,假如没有设置我们就使用默认的图片
        mClearDrawable = getCompoundDrawables ()[2];
        if (mClearDrawable == null) {
            mClearDrawable = getResources ().getDrawable (R.drawable.delete_selector);
        }

        mClearDrawable.setBounds (0, 0, mClearDrawable.getIntrinsicWidth (), mClearDrawable.getIntrinsicHeight ());
        // 默认设置隐藏图标
        setClearIconVisible (false);
        // 设置焦点改变的监听
        setOnFocusChangeListener (this);
        // 设置输入框里面内容发生改变的监听
        addTextChangedListener (this);
    }

    /**
     * 当ClearEditText焦点发生变化的时候，判断里面字符串长度设置清除图标的显示与隐藏
     */
    @Override
    public void onFocusChange (View v, boolean hasFocus) {
        this.hasFoucs = hasFocus;
        if (hasFocus) {
            setClearIconVisible (getText ().length () > 0);
        } else {
            setClearIconVisible (false);
        }
    }

    /**
     * 设置清除图标的显示与隐藏，调用setCompoundDrawables为EditText绘制上去
     */
    protected void setClearIconVisible (boolean visible) {
        Drawable right = visible ? mClearDrawable : null;
        setCompoundDrawables (getCompoundDrawables ()[0], getCompoundDrawables ()[1], right, getCompoundDrawables ()[3]);
    }

    /**
     * 当输入框里面内容发生变化的时候回调的方法
     */
    @Override
    public void onTextChanged (CharSequence s, int start, int count, int after) {
        if (hasFoucs) {
            setClearIconVisible (s.length () > 0);
        }
    }

    /**
     * 因为我们不能直接给EditText设置点击事件，所以我们用记住我们按下的位置来模拟点击事件 当我们按下的位置 在 EditText的宽度 -
     * 图标到控件右边的间距 - 图标的宽度 和 EditText的宽度 - 图标到控件右边的间距之间我们就算点击了图标，竖直方向就没有考虑
     */
    @Override
    public boolean onTouchEvent (MotionEvent event) {
        if (event.getAction () == MotionEvent.ACTION_UP) {
            if (getCompoundDrawables ()[2] != null) {
                boolean touchable = event.getX () > (getWidth () - getTotalPaddingRight ()) && (event.getX () < ((getWidth () - getPaddingRight ())));

                if (touchable) {
                    this.setText ("");
                }
            }
        }

        return super.onTouchEvent (event);
    }

    @Override
    public void beforeTextChanged (CharSequence s, int start, int count, int after) {}

    @Override
    public void afterTextChanged (Editable s) {}

    /**
     * 设置晃动动画
     */
    public void setShakeAnimation () {
        this.setAnimation (shakeAnimation (5));
    }
}